*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;background:#f0f7fb;color:#1e293b;min-height:100vh}.page-shell-light{min-height:100vh;background:linear-gradient(180deg,#f0f7fb,#e8f4f8)}.page-enter{animation:fadeInSlideUp .45s ease both}.list-item-enter{animation:fadeInSlideUp .32s ease both}.message-enter{animation:fadeInSlideUp .25s ease both}@media (prefers-reduced-motion: reduce){.page-enter,.list-item-enter,.message-enter{animation:none}}#root{min-height:100vh}a{text-decoration:none;color:inherit}.btn{display:inline-block;padding:10px 24px;border-radius:8px;font-size:16px;font-weight:500;cursor:pointer;border:none;transition:all .2s}.btn-primary{background:linear-gradient(135deg,#0891b2,#0ea5e9);color:#fff;box-shadow:0 2px 8px #0891b240}.btn-primary:hover{background:linear-gradient(135deg,#0e7490,#0284c7);box-shadow:0 4px 12px #0891b24d}.btn-with-icon{display:inline-flex;align-items:center;gap:6px}.btn-secondary{background:#fff;color:#333;border:1px solid #d9d9d9}.btn-secondary:hover{border-color:#1677ff;color:#1677ff}.home-page{position:relative;display:flex;align-items:center;justify-content:center;min-height:100vh;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;background:linear-gradient(160deg,#0a1628,#0d2847,#0a3b5c 60%,#092d4a);color:#fff}.particles-container{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.particle{position:absolute;bottom:-30px;border-radius:50%;background:#38bdf899;box-shadow:0 0 12px #38bdf84d;animation:particleRise linear infinite}@keyframes particleRise{0%{transform:translateY(0) scale(1) rotate(0);opacity:0}10%{opacity:1}90%{opacity:.6}to{transform:translateY(-110vh) scale(.3) rotate(720deg);opacity:0}}.glow-orbe{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none;opacity:.3}.glow-orbe-1{width:500px;height:500px;top:-150px;right:-100px;background:radial-gradient(circle,rgba(6,182,212,.5),transparent);animation:orbePulse 8s ease-in-out infinite}.glow-orbe-2{width:400px;height:400px;bottom:-100px;left:-120px;background:radial-gradient(circle,rgba(56,189,248,.4),transparent);animation:orbePulse 10s ease-in-out infinite reverse}@keyframes orbePulse{0%,to{transform:scale(1);opacity:.3}50%{transform:scale(1.2);opacity:.5}}.home-hero{position:relative;z-index:1;text-align:center;max-width:580px;padding:48px 40px;opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s ease}.home-hero.visible{opacity:1;transform:translateY(0)}.brand-badge{display:inline-flex;align-items:center;gap:8px;margin-bottom:32px;padding:8px 20px;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);border-radius:100px;font-size:13px;font-weight:500;letter-spacing:.5px;color:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:fadeInSlideUp .8s .1s both}.brand-icon{color:#38bdf8}.hero-title{display:flex;flex-direction:column;gap:4px;margin-bottom:20px;animation:fadeInSlideUp .8s .2s both}.title-line{display:block;font-size:44px;font-weight:700;line-height:1.15;letter-spacing:-1px}.title-line.accent{background:linear-gradient(135deg,#38bdf8,#818cf8,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-desc{font-size:16px;line-height:1.7;color:#ffffffa6;margin-bottom:28px;animation:fadeInSlideUp .8s .3s both}.feature-tags{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-bottom:36px;animation:fadeInSlideUp .8s .4s both}.tag{padding:6px 16px;background:#38bdf81a;border:1px solid rgba(56,189,248,.2);border-radius:100px;font-size:13px;font-weight:500;color:#38bdf8e6;transition:all .25s;cursor:default}.tag:hover{background:#38bdf82e;border-color:#38bdf866;transform:translateY(-1px)}.home-actions{display:flex;gap:16px;justify-content:center;animation:fadeInSlideUp .8s .5s both}.btn-action{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .25s;text-decoration:none}.btn-action svg{flex-shrink:0}.btn-primary-action{background:linear-gradient(135deg,#0284c7,#38bdf8);color:#fff;border:none;box-shadow:0 4px 20px #06b6d44d}.btn-primary-action:hover{transform:translateY(-2px);box-shadow:0 8px 30px #06b6d473}.btn-secondary-action{background:#ffffff0f;color:#ffffffd9;border:1px solid rgba(255,255,255,.15);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-secondary-action:hover{background:#ffffff1f;border-color:#ffffff4d;transform:translateY(-2px)}@keyframes fadeInSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.title-line{font-size:30px}.hero-desc{font-size:15px;padding:0 8px}.desc-br{display:none}.home-hero{padding:32px 20px}.brand-badge{font-size:12px;padding:6px 16px}.btn-action{padding:12px 24px;font-size:15px}.feature-tags{gap:8px}.tag{font-size:12px;padding:4px 12px}}@media (max-width: 480px){.title-line{font-size:24px}.home-actions{flex-direction:column;align-items:center}.btn-action{width:220px;justify-content:center}}.chat-page{display:flex;height:100vh;overflow:hidden;background:#f0f7fb}.sidebar{--sidebar-width: 280px;width:var(--sidebar-width);background:#fff;border-right:1px solid #e2eef3;display:flex;flex-direction:column;flex-shrink:0;box-shadow:2px 0 16px #0891b20a;position:relative;overflow:hidden;transition:width .28s cubic-bezier(.4,0,.2,1)}.sidebar.is-resizing{transition:none}.sidebar-header{padding:18px 16px;border-bottom:1px solid #eef4f7;display:flex;justify-content:space-between;align-items:center;flex-shrink:0;min-height:68px;position:relative}.sidebar-header-main{display:flex;justify-content:space-between;align-items:center;flex:1;min-width:0;gap:8px}.sidebar-expand-btn{display:none;width:36px;height:36px;border:1px solid #d1e7ee;background:#fff;color:#64748b;border-radius:8px;cursor:pointer;align-items:center;justify-content:center;flex-shrink:0;z-index:2;transition:border-color .2s,color .2s,background .2s,box-shadow .2s,transform .28s cubic-bezier(.34,1.4,.64,1),opacity .22s ease}.sidebar-expand-btn:hover{border-color:#67e8f9;color:#0891b2;background:#f0fdfa;box-shadow:0 2px 8px #0891b21f}.sidebar.is-collapsed .sidebar-header{justify-content:center;align-items:center;padding:12px 8px}.sidebar.is-collapsed .sidebar-header-main{display:none}.sidebar.is-collapsed .sidebar-expand-btn{display:inline-flex;animation:sidebar-expand-in .28s cubic-bezier(.34,1.4,.64,1)}@keyframes sidebar-expand-in{0%{opacity:0;transform:scale(.82)}to{opacity:1;transform:scale(1)}}.sidebar-list{flex:1;overflow-y:auto;overflow-x:hidden;padding:10px}.sidebar.is-collapsed .sidebar-list{display:none}.sidebar-resize-handle{position:absolute;top:0;right:-3px;width:6px;height:100%;cursor:col-resize;z-index:20;touch-action:none}.sidebar-resize-handle:after{content:"";position:absolute;top:0;bottom:0;left:2px;width:2px;border-radius:2px;background:transparent;transition:background .2s,box-shadow .2s}.sidebar-resize-handle:hover:after,.sidebar.is-resizing .sidebar-resize-handle:after{background:#0891b273;box-shadow:0 0 0 1px #0891b21f}body.sidebar-resizing-active{cursor:col-resize!important;-webkit-user-select:none;user-select:none}body.sidebar-resizing-active *{cursor:col-resize!important}@media (prefers-reduced-motion: reduce){.sidebar,.sidebar-expand-btn{transition:none}.sidebar.is-collapsed .sidebar-expand-btn{animation:none}}.sidebar-header h2{font-size:15px;font-weight:600;color:#1e293b}.new-chat-btn{font-size:12px;color:#0891b2;padding:6px 12px;border-radius:8px;border:1px solid #bae6fd;background:#f0fdfa;transition:all .2s}.new-chat-btn:hover{background:#ccfbf1;border-color:#67e8f9}.sidebar-item{display:block;padding:12px 14px;margin-bottom:6px;border-radius:12px;border:1px solid transparent;position:relative;cursor:pointer;transition:background .2s,border-color .2s,box-shadow .2s}.sidebar-item:hover{background:#f8fcfd;border-color:#e2eef3;box-shadow:0 2px 8px #0891b20f}.sidebar-item.active{background:#ecfeff;border-color:#a5f3fc;border-left:3px solid #0891b2;padding-left:11px}.sidebar-item-title{font-size:13px;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#1e293b;padding-right:28px}.sidebar-item-time{font-size:11px;color:#94a3b8}.sidebar-item-delete{position:absolute;top:10px;right:8px;width:28px;height:28px;border:none;background:#f8fafc;border-radius:8px;cursor:pointer;color:#94a3b8;display:none;align-items:center;justify-content:center;transition:all .15s}.sidebar-item:hover .sidebar-item-delete{display:flex}.sidebar-item-delete:hover{color:#ef4444;background:#fef2f2}.sidebar-empty{padding:40px 16px;text-align:center;color:#94a3b8;font-size:13px}.chat-main{flex:1;display:flex;flex-direction:column;background:#f8fcfd}.chat-toolbar{display:flex;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid #e8f0f4;background:#fff;flex-shrink:0}.chat-toolbar-title{flex:1;margin:0;font-size:17px;font-weight:600;color:#0f172a;text-align:center;letter-spacing:.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-toolbar-spacer{display:none;width:34px;flex-shrink:0}.message-list{flex:1;overflow-y:auto;padding:24px 20px}.message-list-empty{flex:1;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:15px}.message{display:flex;gap:12px;margin-bottom:22px}.message-user{flex-direction:row-reverse}.message-avatar{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;background:#fff;border:1px solid #e2eef3;box-shadow:0 2px 6px #0891b214}.message-body{display:flex;flex-direction:column;max-width:70%}.message-content{padding:12px 16px;border-radius:14px;line-height:1.6;font-size:15px;word-break:break-word}.message-user .message-body{align-items:flex-end}.message-user .message-content{background:linear-gradient(135deg,#0891b2,#22d3ee);color:#fff;border-bottom-right-radius:4px;box-shadow:0 4px 14px #0891b238}.message-assistant .message-content{background:#fff;border:1px solid #e8f0f4;color:#334155;border-bottom-left-radius:4px;box-shadow:0 2px 12px #0891b20f}.cs-button{display:inline-flex;align-items:center;gap:6px;margin-top:8px;padding:8px 16px;background:linear-gradient(135deg,#0284c7,#38bdf8);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;text-decoration:none;transition:all .2s;align-self:flex-start}.cs-button:hover{transform:translateY(-1px);box-shadow:0 4px 12px #06b6d459}.cs-button svg{flex-shrink:0}.bot-avatar-img{width:100%;height:100%;border-radius:50%;object-fit:cover}.suggested-questions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.suggestion-btn{padding:8px 16px;background:#f0fdfa;border:1px solid #99f6e4;border-radius:20px;font-size:13px;font-weight:500;color:#0e7490;cursor:pointer;transition:all .2s}.suggestion-btn:hover{background:#ccfbf1;border-color:#5eead4;box-shadow:0 2px 8px #0891b21f}.message-content h1,.message-content h2,.message-content h3,.message-content h4{margin:8px 0 4px;line-height:1.3}.message-content h1{font-size:1.3em}.message-content h2{font-size:1.15em}.message-content h3{font-size:1.05em}.message-content>:first-child{margin-top:0}.message-content>:last-child{margin-bottom:0}.message-content p{margin:.4em 0}.message-content p:first-child{margin-top:0}.message-content li>p{margin:0}.message-content ul,.message-content ol{padding-left:1.25em;margin:.35em 0}.message-content li{margin:.15em 0}.message-content li+li{margin-top:.1em}.message-content code{background:#0000000f;padding:1px 5px;border-radius:4px;font-size:.9em}.message-content pre{background:#0000000f;padding:10px 14px;border-radius:8px;overflow-x:auto;margin:8px 0}.message-content pre code{background:none;padding:0}.message-content strong{font-weight:600}.message-content img,.message-inline-img{display:block;max-width:min(280px,100%);height:auto;margin:.35em 0 0;border-radius:8px}.message-content a{color:#0891b2;text-decoration:underline}.video-link-btn{display:inline-flex;align-items:center;gap:4px;padding:0;border:none;background:none;color:#0891b2;font:inherit;text-decoration:underline;cursor:pointer;word-break:break-all;text-align:left}.video-link-btn:hover{color:#0e7490}.video-link-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;background:#0891b2;color:#fff;font-size:8px;text-decoration:none;flex-shrink:0}.video-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px;background:#000000a6}.video-modal{position:relative;width:min(900px,100%);background:#000;border-radius:12px;overflow:hidden;box-shadow:0 8px 32px #0006}.video-modal-close{position:absolute;top:8px;right:8px;z-index:1;width:32px;height:32px;border:none;border-radius:50%;background:#0000008c;color:#fff;font-size:22px;line-height:1;cursor:pointer}.video-modal-close:hover{background:#000000bf}.video-modal-player{display:block;width:100%;max-height:80vh;background:#000}.message-content blockquote{border-left:3px solid #d9d9d9;padding-left:12px;margin:4px 0;color:#666}.message-user .message-content strong,.message-user .message-content a{color:inherit}.message-user .message-content code{background:#fff3}.message-user .message-content blockquote{border-color:#fff6;color:#ffffffd9}.thinking-panel{margin-bottom:8px;padding:12px 14px;border-radius:12px;background:#f0fdfa;border:1px solid #ccfbf1;font-size:13px;color:#475569;max-height:140px;overflow-y:auto}.thinking-step{display:flex;align-items:center;gap:8px;padding:3px 0}.thinking-step-dot{width:6px;height:6px;border-radius:50%;background:#0891b2;flex-shrink:0;animation:thinking-pulse 1.2s ease-in-out infinite}.thinking-reasoning{margin-top:6px;padding-top:6px;border-top:1px dashed #99f6e4;color:#64748b;font-size:12px;line-height:1.5;white-space:pre-wrap}@keyframes thinking-pulse{0%,to{opacity:.4}50%{opacity:1}}.typing-dots{display:inline-flex;align-items:center;gap:4px;padding:2px 4px}.typing-dot{width:7px;height:7px;border-radius:50%;background:#999;animation:typing-bounce 1.4s ease-in-out infinite}.typing-dot:nth-child(1){animation-delay:0s}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-8px);opacity:1}}.chat-input{display:flex;gap:10px;padding:16px 20px;border-top:1px solid #e8f0f4;background:#fff;box-shadow:0 -4px 16px #0891b20a}.chat-input textarea{flex:1;border:1px solid #dbeafe;border-radius:12px;padding:12px 16px;font-size:15px;outline:none;resize:none;line-height:1.5;max-height:120px;font-family:inherit;background:#f8fcfd;color:#1e293b;transition:border-color .2s,box-shadow .2s}.chat-input textarea:focus{border-color:#67e8f9;box-shadow:0 0 0 3px #0891b21f;background:#fff}.chat-input button{padding:10px 24px;background:linear-gradient(135deg,#0891b2,#0ea5e9);color:#fff;border:none;border-radius:12px;font-size:15px;font-weight:500;cursor:pointer;white-space:nowrap;align-self:flex-end;transition:all .2s;box-shadow:0 2px 8px #0891b240}.chat-input button:hover:not(:disabled){box-shadow:0 4px 14px #0891b259}.chat-input button:disabled{background:#e2e8f0;color:#94a3b8;box-shadow:none;cursor:not-allowed}.file-upload-btn{display:inline-block;padding:6px 12px;font-size:14px;color:#666;cursor:pointer;border-radius:4px;transition:background .15s}.file-upload-btn:hover{background:#f5f5f5}.loading-spinner{display:flex;flex-direction:column;align-items:center;gap:16px}.loading-spinner p{color:#999;font-size:14px}.spinner-ring{width:36px;height:36px;border:3px solid #e2eef3;border-top-color:#0891b2;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.history-page{padding:40px 20px 56px}.history-inner{max-width:720px;margin:0 auto}.history-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:28px;gap:16px}.history-eyebrow{font-size:12px;font-weight:500;letter-spacing:.04em;color:#0891b2;margin-bottom:6px}.history-header h1{font-size:26px;font-weight:700;color:#1e293b;letter-spacing:-.02em}.history-list-loading{display:flex;justify-content:center;padding:80px 20px}.history-list{display:flex;flex-direction:column;gap:12px}.history-card{display:flex;align-items:center;padding:16px 18px;background:#fff;border:1px solid #e8f0f4;border-radius:16px;box-shadow:0 4px 20px #0891b20f;transition:box-shadow .2s,border-color .2s,transform .2s;cursor:pointer}.history-card:hover{border-color:#bae6fd;box-shadow:0 8px 28px #0891b21a;transform:translateY(-1px)}.history-card-link{flex:1;display:flex;align-items:center;gap:14px;min-width:0}.history-card-icon{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:#ecfeff;border:1px solid #a5f3fc;color:#0891b2;flex-shrink:0}.history-card-body{min-width:0;flex:1}.history-card-title{font-size:15px;font-weight:600;margin-bottom:4px;color:#1e293b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-card-time{font-size:12px;color:#94a3b8}.history-card-delete{width:34px;height:34px;border:none;border-radius:10px;background:transparent;color:#cbd5e1;cursor:pointer;display:none;align-items:center;justify-content:center;flex-shrink:0;margin-left:8px;transition:all .15s}.history-card:hover .history-card-delete{display:flex}.history-card-delete:hover{background:#fef2f2;color:#ef4444}.history-empty-state{text-align:center;padding:64px 24px;background:#fff;border:1px solid #e8f0f4;border-radius:20px;box-shadow:0 4px 24px #0891b20f}.history-empty-icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:14px;background:#ecfeff;border:1px solid #a5f3fc;color:#0891b2;margin-bottom:16px}.history-empty-state p{color:#64748b;margin-bottom:20px;font-size:15px}.history-pagination{display:flex;justify-content:center;gap:8px;margin-top:28px}.history-pagination button{width:36px;height:36px;border:1px solid #e2eef3;border-radius:10px;background:#fff;color:#64748b;cursor:pointer;transition:all .15s;box-shadow:0 1px 4px #0891b20f}.history-pagination button:hover{border-color:#67e8f9;color:#0891b2}.history-pagination button.active{background:linear-gradient(135deg,#0891b2,#0ea5e9);color:#fff;border-color:transparent;box-shadow:0 2px 8px #0891b24d}.sidebar-overlay{display:none}.sidebar-header-actions{display:flex;align-items:center;gap:8px}.sidebar-close-btn{display:none;width:30px;height:30px;border:none;background:none;color:#666;cursor:pointer;border-radius:6px;align-items:center;justify-content:center;transition:background .15s}.sidebar-close-btn:hover{background:#f0f0f0}.sidebar-toggle{display:none;width:34px;height:34px;border:1px solid #d9d9d9;background:#fff;cursor:pointer;border-radius:8px;align-items:center;justify-content:center;transition:all .15s;color:#666;flex-shrink:0}.sidebar-toggle:hover{border-color:#67e8f9;color:#0891b2}@media (max-width: 768px){.home-hero h1{font-size:32px}.home-hero p{font-size:15px;padding:0 20px}.home-hero{padding:0 20px}.home-actions{flex-direction:column;gap:12px;align-items:center}.home-actions .btn{width:200px;text-align:center}.chat-page{position:relative}.sidebar-toggle{display:inline-flex}.sidebar{position:fixed;top:0;left:-300px;width:280px!important;height:100vh;z-index:1000;transition:left .3s ease,width .3s ease;box-shadow:4px 0 24px #0000001a}.sidebar.is-collapsed{width:280px!important}.sidebar.is-collapsed .sidebar-header-main,.sidebar.is-collapsed .sidebar-list{opacity:1;transform:none;pointer-events:auto;position:static;width:auto;height:auto;overflow:visible}.sidebar.is-collapsed .sidebar-expand-btn,.sidebar-resize-handle{display:none}.sidebar.sidebar-open{left:0}.sidebar-close-btn{display:inline-flex}.sidebar-overlay{display:block;position:fixed;top:0;left:0;right:0;bottom:0;background:#0006;z-index:999;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.chat-toolbar{gap:8px;padding:10px 12px}.chat-toolbar-title{font-size:15px}.chat-toolbar-spacer{display:block}.message-list{padding:12px}.message{gap:8px;margin-bottom:16px}.message-body{max-width:85%}.message-content{font-size:14px;padding:10px 14px}.message-avatar{width:30px;height:30px;font-size:16px}.chat-input{padding:10px 12px;gap:6px}.chat-input textarea{font-size:16px;padding:8px 12px}.chat-input button{padding:8px 16px;font-size:14px}.file-upload-btn{font-size:13px;padding:4px 8px}.history-page{padding:24px 14px}.history-header{flex-direction:column;align-items:flex-start;gap:12px}.history-header h1{font-size:22px}.history-card{padding:14px 16px}.history-card-title{font-size:14px}.history-card-delete{display:flex}}@media (max-width: 480px){.sidebar{width:260px}.message-body{max-width:90%}.message-content{max-width:100%;font-size:13px;padding:8px 12px}.home-hero h1{font-size:26px}}